Rename C source file to C++ source files

1 files changed, 84 insertions, 0 deletions

diff --git a/src/file.cpp b/src/file.cpp
new file mode 100644
index 0000000..d605ceb
--- /dev/null
+++ b/src/file.cpp
@@ -0,0 +1,84 @@
+/* Copyright 2019 Ján Sučan <jan@jansucan.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "file.h"
+
+#include "print.h"
+
+#include <errno.h>
+#include <string.h>
+
+size_t
+file_size(FILE *const file, bool *const return_is_ok)
+{
+    fpos_t p;
+
+    if ((fgetpos(file, &p) != 0) || (fseek(file, 0L, SEEK_END) != 0)) {
+        *return_is_ok = false;
+        return 0;
+    }
+
+    const long size = ftell(file);
+
+    if (fsetpos(file, &p) != 0) {
+        *return_is_ok = false;
+        return 0;
+    }
+
+    *return_is_ok = true;
+    return (size_t)size;
+}
+
+size_t
+file_tell(FILE *const file, bool *const return_is_ok)
+{
+    const long pos = ftell(file);
+
+    if (pos < 0) {
+        *return_is_ok = false;
+        return 0;
+    } else {
+        *return_is_ok = true;
+        return (size_t)pos;
+    }
+}
+
+size_t
+file_read_sectors(FILE *const file, char *const buffer, uint32_t buffer_size,
+                  uint32_t sector_size)
+{
+    const size_t bytes_read = fread(buffer, 1U, buffer_size, file);
+
+    if (ferror(file)) {
+        print_error("cannot read from file: %s", strerror(errno));
+        return 0;
+    } else if ((bytes_read % sector_size) != 0) {
+        print_error("data read from input file is not multiple of sector size");
+        return 0;
+    } else {
+        return (bytes_read / sector_size);
+    }
+}